Another interpretation of the Q of a resonance comes from the following: Consider the motion of a driven damped oscillator after any transients have died out, and suppose that it is being driven close to resonance, so you can set (a) Show that the oscillator's total energy (kinetic plus potential) is (b) Show that the energy A Edisdissipated during one cycle by the damping force (Remember that the rate at which a force does work is Fv.) (c) Hence show that Q is 2π times the ratio E/ ∇Edis.
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